--- a/src/java.desktop/share/classes/java/awt/Window.java	Tue Sep 24 22:57:28 2019 +0100
+++ b/src/java.desktop/share/classes/java/awt/Window.java	Tue Sep 24 18:25:54 2019 -0700
@@ -371,6 +371,7 @@
      * @see #setShape(Shape)
      * @since 1.7
      */
+    @SuppressWarnings("serial") // Not statically typed as Serializable
     private Shape shape = null;
 
     private static final String base = "win";